/*重置所有标签的margin、padding、border值为0*/
html, body, div, span, applet, object, iframe,
h1, h2, h3, h4, h5, h6, p, blockquote, pre,
a, abbr, acronym, address, big, cite, code,
del, dfn, em, img, ins, kbd, q, s, samp,
small, strike, strong, sub, sup, tt, var,
b, u, i,
dl, dt, dd, ol, ul, li,
fieldset, form, label, legend,
table, caption, tbody, tfoot, thead, tr, th, td,
article, aside, canvas, details, embed, 
figure, figcaption, footer, header, hgroup, 
menu, nav, output, ruby, section, summary,
time, mark, audio, video {
	margin: 0;
	padding: 0;
	border: 0;
	font-size: 100%;
	font-family: "微软雅黑";
}
/*重置所有a标签的显示颜色为黑色,并删除下划线*/
a{
	color: black;
	text-decoration: none;
}
/*删除有序列表和无序列表的标记类型*/
ol, ul {
	list-style: none;
}

table {
	border-collapse: collapse;/*消除相邻单元格之间的空白距离*/
	border-spacing: 0;/*消除单元格与其内容之间的空白距离*/
}